Inertia operated pump



July 1, 1930; FBMMLAREN 1,769,799

INERTIA OPERATED PUMP Filed April 10, 1922 INVENTOR. fiea 13. Mac [are/7 A TTORNEY Fatentetl .luly l, 193% FRED 1B. MACLARE-Itl, 0F JAllIIAICA, 03K, ASSEGEOB T0 H. BEASELTQN, GE NEW YORK, N. Z.

INEPUTIA-GPEEATED PUMP Application filed A ril 10,

This invention relates to improvements in liquid fuel feed appatus of the type adapted to be operated by the vibrations imparted thereto, and has for its principal object the provision of vibration operated pumping means for supplying liquid fuel for internal combustion engines from a supply tank at a lower level than the engine carburetor to an auxiliary tank mounted above the carburetor level. 7

Another object of my invention is the arrangement of the auxiliary tank and pumping mechanism therein so that an automatic control is efiected whereby the maximum quantity of liquid within such tank at any time may be controlled. 7

Another object of the invention is to provide a Y relatively heavy inertia member mounted for free movement within the auxiliary tank and having spaced portions adapted to engage the internal wall of the tank to guide the movements of such inertia member, the diameter of the remaining portions of such weight being of lesser diameter than that of the tank.

'Other objects and advantages will be apparent from the following description in which ref rence is had to the accompanying drawing forming a part of this specification, and in which similar reference numerals designate similar parts throughout the several views.

In the drawings Figure I is a diagrammatic side elevation of an automobile equipped with my improved apparatus,

Figure ll is a central longitudinal section through the auxiliary tank and vibration operated pumping mechanism.

Referring now to the drawings, the numeral 5 designates the chassis of an automobile having the usual wheels 6, engine 7 rear fuel supply tank 8, carburetor 9, and my improved auxiliary tank '10 enclosing the pumping mechanism. The auxiliary tank 10 is herein shown as secured upon the front ofthe clashboard 11, although this may be mounted in any convenient position upon the automobile at a sufiicient height to enable liquid in the auxiliary tank to flow to the carburetor by gravity. T he tank 10 is preferably cylindri- 1922. Serial No. 551,0'20.

cal and is provided centrally of its lower wall with an opening 12 having an upturned flange adapted to position a cylinder 13 extending upwardly within the tank for a relatively snort distance. The lower extremity of the cylinder 13 is adapted to be closed by a valved bushing 14 with which a coupling 15 is connected leading to the feed pipe 16 connected at its rear extremity with the fuel supply tank 8. A coupling 17 leads from the floor of the tank 10 to the feed pipe 18 connecting the auxiliary tank through the carburetor 9.

The, valve in the bushing let may be of any desired construction, and is herein shown as comprising a ball 19 arranged in a chamber 20 and adapted to normally seat upon and close the aperture 21 leading to the supply pipe 16. An aperture 22 connects the chamber 20 with the interior of the cylinder 13. A plunger 23 surmounted by a weight 24-wgether forming an inertia member is adapted to snugly lit at its lower extremity within the cylinder 13, a brass or other soft metal cap 25 being suitably pressed upon the plunger 23 and machined to snugly lit within said cylinder. An outlet valve for the passage of liquid within the cylinder to the interior of the tank 10 is provided by aperturing the cap 25 and normally closing such aperture by a ball 26, the valve chamber surrounding such ball connecting with an upper opening 27 leading through the sides of the plunger into the tank 10. For convenience in construction the aperture 27 is preferably formed as a slot exte'ndin g from side to side across the plunger and the valve chamber is an enlargement of said slot. It will be understood however, that this construction may be changed and that the illustration thereof is only by way of exomplification.

The inertia mechanism is normally maiir tained with the plunger raised by means of a spring 28 extending between the lower surface of the weight 2% and the floor of the tank. The weight is guided in its movements relatively to the wall of the tank by a circular guide 29 fitted within the top of the tank 10 substantially as shown. The interior wall of the guide ring 29 is preferably machined to a true circle with the center of the tank as its center, and the weight 24 is provided with a plurality of spaced ribs the walls of which are also machined to provide a. slight clearance between the ribs and the wall of the guide ring. \Vith this construction the weight 24 and plunger 23 are accurately centered within the tank 10 with a minimum of friction when relative movements are imparted due to the vibrations. The periphery of the weight 24 between the ribs 30 is cut away so as to permit the passage of liquid around the weight. A guide rod 31 extends from the upper surface of the weight 24 through a central aperture 32 in the cap 33 and also serves to guide the inertia mechanism in its relative movements. The cap is provided with a raised portion terminating at its lower extremity with a substantially horizontal flanged portion 34 and a circular flanged portion 35 adapted to fit over the periphery of the Hide ring 29 substantially as shown. By mac ining the periphery of the guide ring and the interior of the flanged portion 35 the cap 33 may be accurately centered. The cap is preferably secured upon the tank by screws or thelike passingthrough the horizontal flanged portion 34 and the guide ring 29.

In operation the vibrations of the automobile as it rolls along the road is sufficient to set in motion the tank 10, which it moves vertically relatively to the inertia member formed by the plunger 23 and weight 24 which because of its great mass is slow to vibrate and can be considered as remaining in a substantially stationary position. The downward movement of the tank 10 tends to lower the cylinder relatively to the plunger 23 creating a suction which lifts the ball 19 from its seat and draws in liquid from the supply tank 8 through the feed pipe 14. The upward movement of the tank 10 and cylinder 13 upon the plun er 23 tends to close the ball valve 19 and orce the liquid then within the cylinder 13 into the interior of the tank 10 by elevatilig the ball 26 and passing through the slot 27 in the plunger. The next downward movement of the tank relatively to the inertia member will again draw liquid fuel into the c linder 13, and this alternate admission and egection from the cylinder 13 will be con- 1. nued until the liquid within the tank 10 has reached a predetermined level which is controlled by the closing by the liquid itself of the space between the periphery of the weight 24 and the'wall of the tank. '1 he friction will thereupon tend to prevent relative movement of the inertia member and tank, and the same will vibrate together creating no suction within the cylinder 13. This will continue until the level of the liquid in the tank 10 falls sufficiently to enable the relative movements of the inertia member of the tank to again draw in fuel from the supply tank.

Having described my invention what P claim is:

1. In a fuel feeding mechanism, a tank adapted to contain liquid fuel, an auxiliary tank connected therewith, an outlet ipe for said tank, means for pumping liquid rom the supply tank to the auXiliary tank, a weighted member connected to said pumping means and adapted to operate said means by inertia, a spring for normally maintaining the member in raised position, means for guiding the relative movements of the inertia member and tank including a guide ring secured to said tank and spaced from the top thereof, and means to permit a small quantity of fuel to flow between said means and weighted member.

2. In a fuel feeding mechanism, a tank adapted to contain liquid fuel, an auxiliary tank connected therewith, an outlet pipe for said tank, means for pumping liquid from the supply tank to the auxiliary tank, a weighted member connected to said pumping means and adapted to operate said means by inertia, a spring for normally maintaining the member in raised position, means for guiding the relative movements of the inertia member and tank including a guide ring secured to said tank, and spaced ribs upon the inertia member terminating adjacent the guide ring.

3. In a fuel feeding mechanism, a tank having an apertured lower wall, a cylinder secured in said aperture, a valved closure for the lower extremity of the cylinder, a plunger fitting into the upper port-ion of the cylinder and having a valve therein, a weight carried by the plunger and having a plurality of spaced ribs on its periphery, and means for guiding the plunger and cylinder in their relative movements including a guide ring secured to said tank and having its inner wall of slightly greater diameter than the edges of said guide ribs.

4. In a fuel feeding mechanism, a tank having an apertured floor wall, a cylinder secured in said aperture, a valved closure for the lower extremity of the cylinder, a plunger fitting into the upper portion of the cylinder and having a valve therein, a weight carried by the plunger and having a plurality of spaced ribs on its periphery, means for guiding the plunger and cylinder in their relative movements including a guide ring secured to said tank and having its inner wall of slightly greater diameter than the edges of said guide ribs, a cap for said tank having a flange adapted to fit closely over the periphery of the guide ring and having a central aperture therein, and a guide rod projecting from said weight through such central aperture.

5. In a liquid pump mechanism, the combination of a tank, a pumping chamber within the tank, inlet and outlet valves connected to said pumping chamber, said outlet valve connecting the pump chamber and the tank interior, an inertia member adapted to vary the size of said pumping chamber, guide ribs on the periphery of said inertia member positioned in approximately parallel relationship to the direction of movement of the inertia member, and means secured to the tank and cooperating with said ribs to guide said inertia member.

6 In inertia operated pump mechanism, pumping means, a weighted member connected to said pumping means and adapted to be reciprocated, a guide ring adjacent said weighted member and supported rigidly with respect to said pumping means and guide ribs secured to the Weighted member, said ribs extending in a direction approximately parallel to the direction of movement of the weighted member.

In testimony whereof, I aflix my signature.

FEE-D B. MAGLAREN. 

